For PDF files you will need Adobe Acrobat
Reader installed on your computer. If you
don't have it, you can follow these instructions
to install Reader onto your computer.
1- Download the free Acrobat Reader Plug In
for your operating system.
2-
Once downloaded, double-click file to install.
For
Audio files you will need Realplayer installed
on your computer. If you don't have it,
you can download it here: